RMI is a longtime proponent of energy efficiency policies–founder Amory Lovins famously said, “Energy efficiency isn’t just a free lunch; it’s a lunch you are paid to eat”–so it is not surprising that they’re somewhat critical of arguments suggesting large rebound or backfire effects from efficiency improvements. Breakthrough’s report seems a more straightforward review of the literature on the topic, mostly with an aim of making technical economic work done on the subject accessible to the non-economist.